Abstract
In this paper, the load frequency control problem of multi-area interconnected power systems containing PV and energy storage system is considered. First, based on the traditional load frequency control model, the model of photovoltaic and energy storage system is established. Then, when the upper and lower bounds of disturbances are known, a fast terminal sliding mode controller is designed, which compensates the influence of disturbances effectively. Further, by introducing an adaptive law to estimate the bound of the unknown disturbances, an adaptive fast terminal sliding mode controller is designed, which reduces the dependence on the disturbance boundary. By designing the controller, the stability of the system is analyzed. Finally, simulations are performed with two area power systems to verify the effectiveness of the designed controller. The simulation results show that the adaptive fast terminal sliding mode controller can overcome the effects of disturbances. In addition, when the energy storage system and the controller participate in frequency regulation, the load frequency deviation fluctuation is further reduced, which enhances the performance of system.
Highlights
In recent years, with the increasingly serious situation of global warming, concerns about energy security and anxiety about environmental degradation have deepened, making full use of renewable energy has become global consensus
In order to solve the influence of PV generation uncertainty on load frequency deviation, a load frequency control (LFC) model of interconnected power systems containing PV and energy storage systems (ESS) is proposed in this paper
From Eq (23), it can be derived that, when the adaptive law is can be guaranteed, which means that s(t) = 0 is satisfied under AFTSMC
Summary
With the increasingly serious situation of global warming, concerns about energy security and anxiety about environmental degradation have deepened, making full use of renewable energy has become global consensus. The above research results have achieved LFC for systems containing energy storage, the renewable energy generation connected to the grid has not been considered. In order to suppress the load frequency deviation of the interconnected system containing wind power, a hybrid control method based on fuzzy logic and nonlinear sliding mode control is proposed in [13]. Faced with the systems containing renewable energy sources and ESS, TSMC is designed and optimized by artificial bee colony algorithm in [21], which achieved the control objectives of LFC. In order to solve the influence of PV generation uncertainty on load frequency deviation, a LFC model of interconnected power systems containing PV and ESS is proposed in this paper. Based on proposed LFC model containing PV and ESS, a TSMC is designed to reduce the load frequency deviation of interconnected power systems.
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